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Paolo 'Blaisorblade' Giarrussofbdf2162006-03-31 02:30:19 -08001/*
2 * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
3 * Licensed under the GPL
4 *
5 * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
6 */
7
8#ifndef __ASM_LDT_H
9#define __ASM_LDT_H
10
11#include "asm/semaphore.h"
12#include "asm/host_ldt.h"
13
14struct mmu_context_skas;
15extern void ldt_host_info(void);
16extern long init_new_ldt(struct mmu_context_skas * to_mm,
17 struct mmu_context_skas * from_mm);
18extern void free_ldt(struct mmu_context_skas * mm);
19
20#define LDT_PAGES_MAX \
21 ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
22#define LDT_ENTRIES_PER_PAGE \
23 (PAGE_SIZE/LDT_ENTRY_SIZE)
24#define LDT_DIRECT_ENTRIES \
25 ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
26
27struct ldt_entry {
28 __u32 a;
29 __u32 b;
30};
31
32typedef struct uml_ldt {
33 int entry_count;
34 struct semaphore semaphore;
35 union {
36 struct ldt_entry * pages[LDT_PAGES_MAX];
37 struct ldt_entry entries[LDT_DIRECT_ENTRIES];
38 } u;
39} uml_ldt_t;
40
41#endif